From: Bisphosphonate combination therapy for non-femoral avascular necrosis
Mean VAS
Baseline
4 weeks
1 year
2 year
Last follow-up
Mean (range)
7.72 (5–9)
3.12 (1–6)
2.44 (0–4)
0.83 (0–3)
0.56 (0–3)
P value (t test)
< 0.0001
< 0.001